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Those apps are not google play dependant, they are in direct relation with the software update app. Music update comes from google play, but what's new, support come from the software update app.
What @alexdon said it's correct, I still don't see any correlation between your lost contacts and the music app update
They cannot, sorry. You can force the software update app to close but after a restart the updates will be back.
Simple
Settings > about phone > software update > menu > settings > Automatic settings > Allow automatic updates "Do not update automatically"